'Round keys' diaporamas de présentation

CS/ECE Advanced Network Security Dr. Attila Altay Yavuz

CS/ECE Advanced Network Security Dr. Attila Altay Yavuz. Topic 2.2 Symmetric Crypto (2) Credit: Prof. Dr. Peng Ning for slides. Fall 2014. plaintext. ciphertext. plaintext. Encryption. Decryption. key. Secret Key Cryptography. Same key is used for both encryption and decryption

923 views • 74 slides

Introduction to Information Security Lecture 3: Block and Stream Ciphers

987 views • 73 slides

Mapping the AES Algorithm to MorphoSys Architecture

Mapping the AES Algorithm to MorphoSys Architecture. Ye Tang Aug 2001. Overview. Part I: AES Algorithm Introduction Part II: Mapping to MorphoSys Part III: Performance Evaluation. Part I: AES Introduction. What Is AES?. A dvanced E ncryption S tandard

799 views • 68 slides

CS/ECE 478 Dr. Attila Altay Yavuz

CS/ECE 478 Dr. Attila Altay Yavuz. Symmetric Crypto Credit: Prof. Dr. Peng Ning for slides. plaintext. ciphertext. plaintext. Encryption. Decryption. key. Secret Key (Symmetric) Cryptography. Same key is used for both encryption and decryption

565 views • 56 slides

562 views • 56 slides

Digital Encryption Standard

Digital Encryption Standard. CSIS 5857: Encoding and Encryption. History of DES. 1973: National Institute of Standards requests proposals for national symmetric key cryptosystem 1975: NIST accepts proposal from IBM as national Digital Encryption Standard Based on Feistel cipher 56-bit key

740 views • 44 slides

Cryptography and Network Security Chapter 3

Cryptography and Network Security Chapter 3. Fifth Edition by William Stallings Lecture slides by Lawrie Brown. Content. Block Cipher Principles The Data Encryption Standard Simplified-DES DES Details DES Design Issues and Attacks 3DES, AES and Other Block Ciphers. The objectives.

1.23k views • 44 slides

DIFFERENTIAL CRYPTANALYSIS

DIFFERENTIAL CRYPTANALYSIS. Chapter 3.4. Ciphertext only attack. The cryptanalyst knows the cryptograms. This happens, if he can eavesdrop the communication channels. Known-plaintext attack. The adversary can access not only the communication channels but also parts of plaintext.

666 views • 36 slides

Computer Security

324 views • 32 slides

Computer Security

Computer Security. Private Key Algorithms Feistel Networks AES. Plaintext. C = E k (M). Encryption. Key 1. Cyphertext. Decryption. M = D k (C). Key 1. Original Plaintext. Symmetric/Private Key Algorithms. What granularity of the message does E k encrypt?. Private Key Exchange.

283 views • 28 slides

The AES block cipher

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Remaining lectures

562 views • 22 slides

Scan Based Attack on Dedicated Hardware Implementation of Data Encryption Standard

Why is Scan a Bad Design For Test Methodology?. Scan Based Attack on Dedicated Hardware Implementation of Data Encryption Standard. Scan DFT is extremely popular. Scan DFT is extensively deployed 82% of all ICs use Scan DFT for testing Scan DFT is widely supported

368 views • 20 slides

A Ultra-Light Block Cipher KB1

A Ultra-Light Block Cipher KB1. Changhoon Lee Center for Information Security Technologies, Korea University. crypto77@cist.korea.ac.kr. Contents. Introduction Background Design Goals Description of Block Cipher KB1 Security Analysis Implementation Efficiency Conclusion.

315 views • 18 slides

Keys

Keys. A key is define the piece inserted in a axial direction between a shaft and hub to prevent relative rotation but allow sliding movement along the shaft if required.

2.32k views • 17 slides

Symmetric Encryption Example: DES

Symmetric Encryption Example: DES. Weichao Wang. Overview of the DES. A block cipher: encrypts blocks of 64 bits using a 64 bit key outputs 64 bits of ciphertext A product cipher basic unit is the bit performs both substitution and transposition (permutation) on the bits

245 views • 15 slides

DES Illustrated

DES Illustrated. Sanjay Rawat Sanjay_r@vnrvjiet.in example courtesy: J. Orlin Grabbe. DES example. M = 0123456789ABCDEF M = 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111

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Block Ciphers Lucifer & DES

Block Ciphers Lucifer & DES. CS 470 Introduction to Applied Cryptography Instructor: Ali Aydin Selcuk. . . . . S. S. S. S. S. S. S. S. S. P. . . . . . . . . . P. Block Ciphers & S-P Networks. Block Ciphers: Substitution ciphers with large block size (? 64 bits)

335 views • 8 slides